A survey of 2312 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 411 have donated blood in the past two years. Complete parts (a) through (c) below. Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). *** (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated blood in the past two years. D=178 (Round to three decimal places as needed) (b) Verify that the requirements for constructing a confidence interval about p are satisfied The sample can be assumed to be a simple random sample, the value of np (1-6) is 338 283, which is greater than or equal to 10, and the can be assumed to be less than or equal to 5% of the population size (Round to three decimal places as needed) (c) Construct and interpret a 90% confidence interval for the population proportion of adults in the country who have donated blood in the past two years Select the correct choice below and fill in any answer boxes within your choice. (Type integers or decimals rounded to three decimal places as needed Use ascending order) OA. We are OB. There is a % confident the proportion of adults in the country aged 18 and older who have donated blood in the past two years is between and sample size % probability the proportion of adults in the country aged 18 and older who have donated blood in the past two years is between and